73220997 has 8 divisors (see below), whose sum is σ = 97843456. Its totient is φ = 48706272.

The previous prime is 73220981. The next prime is 73220999. The reversal of 73220997 is 79902237.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 73220997 - 2⁴ = 73220981 is a prime.

It is a super-2 number, since 2×73220997² = 10722628803348018, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73220999) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25333 + ... + 28074.

It is an arithmetic number, because the mean of its divisors is an integer number (12230432).

Almost surely, 2^73220997 is an apocalyptic number.

It is an amenable number.

73220997 is a deficient number, since it is larger than the sum of its proper divisors (24622459).

73220997 is a wasteful number, since it uses less digits than its factorization.

73220997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53867.

The product of its (nonzero) digits is 47628, while the sum is 39.

The square root of 73220997 is about 8556.9268432072. The cubic root of 73220997 is about 418.3552397044.

The spelling of 73220997 in words is "seventy-three million, two hundred twenty thousand, nine hundred ninety-seven".